<div id="pushes">
    {foreach from=$pushes item=i name=pushes}
        {if $i.contenu!=""}
            {if $smarty.foreach.pushes.iteration%2==0}
                <div class="pushesr">{$i}</div>
            {else}
                <div class="pushesl">{$i}</div>
            {/if}
            <!-- saut de ligne -->
            {if $smarty.foreach.pushes.iteration==2}
                <div class="clear"></div>
            {/if}
        {/if}
    {/foreach}
</div>
<div class="clear"></div>